Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Unsteady Thermal Stratified Flow and Heat Transfer in a Horizontal Feedwater Pipe

수평급수배관 내에서의 비정상 열성층유동 및 열전달

  • Yeom, Hak-Gi (Power Technology Development Research Center, Korea Power Engineering Corporation) ;
  • Park, Man-Heung (Power Technology Development Research Center, Korea Power Engineering Corporation)
  • 염학기 (한국전력기술(주) 전력기술개발연구소) ;
  • 박만흥 (한국전력기술(주) 전력기술개발연구소)
  • Published : 1996.02.01
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Abstract

In this paper, the unsteady state calculational model is proposed for the thermal stratification analysis in the feedwater line of the PWR plant. By defining dimensionless parameters in the two-dimensional polar coordinate system and applying SIMPLE algorithm, the temperature and flow profiles due to the thermal stratification are obtained. Base on the fact that the most significant condition occurs when the fluid temperature difference between the piping ends reaches as high as 166.deg. C, the present result shows that max. Dimensionless temperature difference of 0.6 (about l00.deg. C) obtained between hot and cold sections of pipe wall at dimensionless time 47.0.

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